ABSTRAK
Penelitian ini bertujuan untuk membuktikan: (1) metode pembelajaran GI dengan menggunakan media flashcard mampu meningkatkan aktivitas belajar siswa.(2) metode pembelajaran GI dengan menggunakan media flashcard mampu meningkatkan kemampuan kognitif siswa.
Penelitian ini merupakan penelitian tindakan kelas (classroom action research) dengan model Kurt Lewin dan model kolaboratif yang dilaksanakan dalam dua siklus. Siklus diawali  tahap persiapan kemudian dilanjutkan tahap pelaksanaan siklus yang terdiri dari perencanaan tindakan, pelaksanaan tindakan, observasi danevaluasi, serta refleksi. Subyek penelitian adalah siswa kelas VII ESMP Negeri 16Surakarta  tahun pelajaran 2012/2013sebanyak 27 siswa dengan penelitian pada materi pemuaian. Data diperoleh melalui pengamatan, wawancara, tes kemampuan kognitif, dan kajian dokumen. Teknik analisis data yang digunakan adalah kuantitatif dan kualitatif.
Berdasarkan hasil penelitian, dapat disimpulkan bahwa(1) penerapan metodeGI dengan menggunakan media flashcard dapat meningkatkan aktivitas belajar siswa.Dari tiga aspek aktivitas belajar yang menjadi fokus penelitian diperoleh hasil sebagai berikut: (a) Visual Activitiesdapat mencapai82 %, (b) Oral Activities dapat mencapai 48 %, (c) Writing Activities dapat mencapai68 %.(2) metode pembelajaran GIdengan menggunakan media flashcard dapat meningkatkan kemampuan kognitif siswa. Hal ini dapat terlihat dari meningkatnya persentase ketercapaian ketuntasan belajar siswa yaitu 29,62% pada pra siklus, menjadi 48,14% di siklus I, dan 92,59% di siklus II. Hasil ini telah memenuhi batas Kriteria Ketuntasan Minimal (KKM) SMP Negeri16 Surakarta yaitu 75.
Kata Kunci: Group Investigation, flash card, aktivitas, kognitif, PTK, pemuaian, fisika.
ABSTRACT
This research aims to prove that: (1) a method of learning GI using flashcards media can improve students learning activities of students (2) the method of learning GI using flashcards media can improve the cognitive abilities of students.
This research is a classroom action (classroom action research) with a model of Kurt Lewin and collaborative model conducted in two cycles. The cycles began with the preparation phase and then continued to the implementation phase of the cycles which consisted of action planning, action, observation and evaluation, and reflection as well. Subjects were 27 students of class VII E SMP Negeri 16 Surakarta in school year 2012/2013 with research area on material of expansion. Data were obtained through observation, interviews, cognitive ability test, and document review. Data analysis techniques used in this research are quantitative and qualitative.
Based on the research results, it can be concluded that (1) the application of methods GI using flashcards media can enhance the learning activities of students. Based on three aspects of learning activities that becomes the focus of the research, was obtained the following results: (a) Visual Activities can reach 82%, (b) Oral Activities can reach 48%, (c) Writing Activities can reach 68%. (2) the method of learning GI using flashcard media can improve the cognitive abilities of students. It can be seen from the increasing percentage of mastery learning achievement of students is 29.62% in the pre-cycle, 48.14% in the first cycle, and 92.59% in the second cycle. These results have met the completeness criteria limits minimal (KKM) of SMP Negeri16 Surakarta, namely 75.
Keywords: Group Investigation, flash cards, activity, cognitive, PTK, expansion, physics.